1 /* vi: set sw=4 ts=4: */
3 * httpd implementation for busybox
5 * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
6 * Copyright (C) 2003-2006 Vladimir Oleynik <dzo@simtreas.ru>
8 * simplify patch stolen from libbb without using strdup
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 *****************************************************************************
16 * httpd -p 8080 -h $HOME/public_html
17 * or for daemon start from rc script with uid=0:
19 * This is equivalent if www user have uid=80 to
20 * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
23 * When an url starts by "/cgi-bin/" it is assumed to be a cgi script. The
24 * server changes directory to the location of the script and executes it
25 * after setting QUERY_STRING and other environment variables.
28 * "CGI Environment Variables": http://hoohoo.ncsa.uiuc.edu/cgi/env.html
30 * The applet can also be invoked as an url arg decoder and html text encoder
32 * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
33 * bar=`httpd -e "<Hello World>"` # encode as "<Hello World>"
34 * Note that url encoding for arguments is not the same as html encoding for
35 * presentation. -d decodes an url-encoded argument while -e encodes in html
38 * httpd.conf has the following format:
40 * H:/serverroot # define the server root. It will override -h
41 * A:172.20. # Allow address from 172.20.0.0/16
42 * A:10.0.0.0/25 # Allow any address from 10.0.0.0-10.0.0.127
43 * A:10.0.0.0/255.255.255.128 # Allow any address that previous set
44 * A:127.0.0.1 # Allow local loopback connections
45 * D:* # Deny from other IP connections
46 * E404:/path/e404.html # /path/e404.html is the 404 (not found) error page
47 * I:index.html # Show index.html when a directory is requested
49 * P:/url:[http://]hostname[:port]/new/path
50 * # When /urlXXXXXX is requested, reverse proxy
51 * # it to http://hostname[:port]/new/pathXXXXXX
53 * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
54 * /adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
55 * /adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
56 * .au:audio/basic # additional mime type for audio.au files
57 * *.php:/path/php # run xxx.php through an interpreter
59 * A/D may be as a/d or allow/deny - only first char matters.
60 * Deny/Allow IP logic:
61 * - Default is to allow all (Allow all (A:*) is a no-op).
62 * - Deny rules take precedence over allow rules.
63 * - "Deny all" rule (D:*) is applied last.
66 * 1. Allow only specified addresses
67 * A:172.20 # Allow any address that begins with 172.20.
68 * A:10.10. # Allow any address that begins with 10.10.
69 * A:127.0.0.1 # Allow local loopback connections
70 * D:* # Deny from other IP connections
72 * 2. Only deny specified addresses
73 * D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
74 * D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
75 * A:* # (optional line added for clarity)
77 * If a sub directory contains a config file it is parsed and merged with
78 * any existing settings as if it was appended to the original configuration.
80 * subdir paths are relative to the containing subdir and thus cannot
81 * affect the parent rules.
83 * Note that since the sub dir is parsed in the forked thread servicing the
84 * subdir http request, any merge is discarded when the process exits. As a
85 * result, the subdir settings only have a lifetime of a single request.
87 * Custom error pages can contain an absolute path or be relative to
88 * 'home_httpd'. Error pages are to be static files (no CGI or script). Error
89 * page can only be defined in the root configuration file and are not taken
90 * into account in local (directories) config files.
92 * If -c is not set, an attempt will be made to open the default
93 * root configuration file. If -c is set and the file is not found, the
94 * server exits with an error.
97 /* TODO: use TCP_CORK, parse_config() */
100 #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
101 # include <sys/sendfile.h>
106 #define IOBUF_SIZE 8192 /* IO buffer */
108 /* amount of buffering in a pipe */
110 # define PIPE_BUF 4096
112 #if PIPE_BUF >= IOBUF_SIZE
113 # error "PIPE_BUF >= IOBUF_SIZE"
116 #define HEADER_READ_TIMEOUT 60
118 static const char DEFAULT_PATH_HTTPD_CONF[] ALIGN1 = "/etc";
119 static const char HTTPD_CONF[] ALIGN1 = "httpd.conf";
120 static const char HTTP_200[] ALIGN1 = "HTTP/1.0 200 OK\r\n";
122 typedef struct has_next_ptr {
123 struct has_next_ptr *next;
126 /* Must have "next" as a first member */
127 typedef struct Htaccess {
128 struct Htaccess *next;
130 char before_colon[1]; /* really bigger, must be last */
133 /* Must have "next" as a first member */
134 typedef struct Htaccess_IP {
135 struct Htaccess_IP *next;
141 /* Must have "next" as a first member */
142 typedef struct Htaccess_Proxy {
143 struct Htaccess_Proxy *next;
151 HTTP_PARTIAL_CONTENT = 206,
152 HTTP_MOVED_TEMPORARILY = 302,
153 HTTP_BAD_REQUEST = 400, /* malformed syntax */
154 HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
155 HTTP_NOT_FOUND = 404,
156 HTTP_FORBIDDEN = 403,
157 HTTP_REQUEST_TIMEOUT = 408,
158 HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
159 HTTP_INTERNAL_SERVER_ERROR = 500,
161 #if 0 /* future use */
162 HTTP_SWITCHING_PROTOCOLS = 101,
165 HTTP_NON_AUTHORITATIVE_INFO = 203,
166 HTTP_NO_CONTENT = 204,
167 HTTP_MULTIPLE_CHOICES = 300,
168 HTTP_MOVED_PERMANENTLY = 301,
169 HTTP_NOT_MODIFIED = 304,
170 HTTP_PAYMENT_REQUIRED = 402,
171 HTTP_BAD_GATEWAY = 502,
172 HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
173 HTTP_RESPONSE_SETSIZE = 0xffffffff
177 static const uint16_t http_response_type[] ALIGN2 = {
179 #if ENABLE_FEATURE_HTTPD_RANGES
180 HTTP_PARTIAL_CONTENT,
182 HTTP_MOVED_TEMPORARILY,
183 HTTP_REQUEST_TIMEOUT,
184 HTTP_NOT_IMPLEMENTED,
185 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
191 HTTP_INTERNAL_SERVER_ERROR,
192 #if 0 /* not implemented */
196 HTTP_MULTIPLE_CHOICES,
197 HTTP_MOVED_PERMANENTLY,
200 HTTP_SERVICE_UNAVAILABLE,
204 static const struct {
207 } http_response[ARRAY_SIZE(http_response_type)] = {
209 #if ENABLE_FEATURE_HTTPD_RANGES
210 { "Partial Content", NULL },
213 { "Request Timeout", "No request appeared within 60 seconds" },
214 { "Not Implemented", "The requested method is not recognized" },
215 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
216 { "Unauthorized", "" },
218 { "Not Found", "The requested URL was not found" },
219 { "Bad Request", "Unsupported method" },
221 { "Internal Server Error", "Internal Server Error" },
222 #if 0 /* not implemented */
226 { "Multiple Choices" },
227 { "Moved Permanently" },
229 { "Bad Gateway", "" },
230 { "Service Unavailable", "" },
234 static const char index_html[] ALIGN1 = "index.html";
238 int verbose; /* must be int (used by getopt32) */
239 smallint flg_deny_all;
241 unsigned rmt_ip; /* used for IP-based allow/deny rules */
243 char *rmt_ip_str; /* for $REMOTE_ADDR and $REMOTE_PORT */
244 const char *bind_addr_or_port;
247 const char *opt_c_configFile;
248 const char *home_httpd;
249 const char *index_page;
251 const char *found_mime_type;
252 const char *found_moved_temporarily;
253 Htaccess_IP *ip_a_d; /* config allow/deny lines */
255 IF_FEATURE_HTTPD_BASIC_AUTH(const char *g_realm;)
256 IF_FEATURE_HTTPD_BASIC_AUTH(char *remoteuser;)
257 IF_FEATURE_HTTPD_CGI(char *referer;)
258 IF_FEATURE_HTTPD_CGI(char *user_agent;)
259 IF_FEATURE_HTTPD_CGI(char *host;)
260 IF_FEATURE_HTTPD_CGI(char *http_accept;)
261 IF_FEATURE_HTTPD_CGI(char *http_accept_language;)
263 off_t file_size; /* -1 - unknown */
264 #if ENABLE_FEATURE_HTTPD_RANGES
270 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
271 Htaccess *g_auth; /* config user:password lines */
273 Htaccess *mime_a; /* config mime types */
274 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
275 Htaccess *script_i; /* config script interpreters */
277 char *iobuf; /* [IOBUF_SIZE] */
278 #define hdr_buf bb_common_bufsiz1
281 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
282 const char *http_error_page[ARRAY_SIZE(http_response_type)];
284 #if ENABLE_FEATURE_HTTPD_PROXY
285 Htaccess_Proxy *proxy;
288 #define G (*ptr_to_globals)
289 #define verbose (G.verbose )
290 #define flg_deny_all (G.flg_deny_all )
291 #define rmt_ip (G.rmt_ip )
292 #define bind_addr_or_port (G.bind_addr_or_port)
293 #define g_query (G.g_query )
294 #define opt_c_configFile (G.opt_c_configFile )
295 #define home_httpd (G.home_httpd )
296 #define index_page (G.index_page )
297 #define found_mime_type (G.found_mime_type )
298 #define found_moved_temporarily (G.found_moved_temporarily)
299 #define last_mod (G.last_mod )
300 #define ip_a_d (G.ip_a_d )
301 #define g_realm (G.g_realm )
302 #define remoteuser (G.remoteuser )
303 #define referer (G.referer )
304 #define user_agent (G.user_agent )
305 #define host (G.host )
306 #define http_accept (G.http_accept )
307 #define http_accept_language (G.http_accept_language)
308 #define file_size (G.file_size )
309 #if ENABLE_FEATURE_HTTPD_RANGES
310 #define range_start (G.range_start )
311 #define range_end (G.range_end )
312 #define range_len (G.range_len )
316 range_end = MAXINT(off_t) - 1,
317 range_len = MAXINT(off_t),
320 #define rmt_ip_str (G.rmt_ip_str )
321 #define g_auth (G.g_auth )
322 #define mime_a (G.mime_a )
323 #define script_i (G.script_i )
324 #define iobuf (G.iobuf )
325 #define hdr_ptr (G.hdr_ptr )
326 #define hdr_cnt (G.hdr_cnt )
327 #define http_error_page (G.http_error_page )
328 #define proxy (G.proxy )
329 #define INIT_G() do { \
330 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
331 IF_FEATURE_HTTPD_BASIC_AUTH(g_realm = "Web Server Authentication";) \
332 bind_addr_or_port = "80"; \
333 index_page = index_html; \
338 #define STRNCASECMP(a, str) strncasecmp((a), (str), sizeof(str)-1)
342 SEND_HEADERS = (1 << 0),
343 SEND_BODY = (1 << 1),
344 SEND_HEADERS_AND_BODY = SEND_HEADERS + SEND_BODY,
346 static void send_file_and_exit(const char *url, int what) NORETURN;
348 static void free_llist(has_next_ptr **pptr)
350 has_next_ptr *cur = *pptr;
352 has_next_ptr *t = cur;
359 static ALWAYS_INLINE void free_Htaccess_list(Htaccess **pptr)
361 free_llist((has_next_ptr**)pptr);
364 static ALWAYS_INLINE void free_Htaccess_IP_list(Htaccess_IP **pptr)
366 free_llist((has_next_ptr**)pptr);
369 /* Returns presumed mask width in bits or < 0 on error.
370 * Updates strp, stores IP at provided pointer */
371 static int scan_ip(const char **strp, unsigned *ipp, unsigned char endc)
373 const char *p = *strp;
381 for (j = 0; j < 4; j++) {
384 if ((*p < '0' || *p > '9') && *p != '/' && *p)
387 while (*p >= '0' && *p <= '9') {
398 ip = (ip << 8) | octet;
412 /* Returns 0 on success. Stores IP and mask at provided pointers */
413 static int scan_ip_mask(const char *str, unsigned *ipp, unsigned *maskp)
419 i = scan_ip(&str, ipp, '/');
424 /* there is /xxx after dotted-IP address */
425 i = bb_strtou(str, &p, 10);
427 /* 'xxx' itself is dotted-IP mask, parse it */
428 /* (return 0 (success) only if it has N.N.N.N form) */
429 return scan_ip(&str, maskp, '\0') - 32;
438 if (sizeof(unsigned) == 4 && i == 32) {
439 /* mask >>= 32 below may not work */
445 /* i == 0 -> *maskp = 0x00000000
446 * i == 1 -> *maskp = 0x80000000
447 * i == 4 -> *maskp = 0xf0000000
448 * i == 31 -> *maskp = 0xfffffffe
449 * i == 32 -> *maskp = 0xffffffff */
450 *maskp = (uint32_t)(~mask);
455 * Parse configuration file into in-memory linked list.
457 * Any previous IP rules are discarded.
458 * If the flag argument is not SUBDIR_PARSE then all /path and mime rules
459 * are also discarded. That is, previous settings are retained if flag is
461 * Error pages are only parsed on the main config file.
463 * path Path where to look for httpd.conf (without filename).
464 * flag Type of the parse request.
468 FIRST_PARSE = 0, /* path will be "/etc" */
469 SIGNALED_PARSE = 1, /* path will be "/etc" */
470 SUBDIR_PARSE = 2, /* path will be derived from URL */
472 static void parse_conf(const char *path, int flag)
474 /* internally used extra flag state */
475 enum { TRY_CURDIR_PARSE = 3 };
478 const char *filename;
481 /* discard old rules */
482 free_Htaccess_IP_list(&ip_a_d);
484 /* retain previous auth and mime config only for subdir parse */
485 if (flag != SUBDIR_PARSE) {
486 free_Htaccess_list(&mime_a);
487 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
488 free_Htaccess_list(&g_auth);
490 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
491 free_Htaccess_list(&script_i);
495 filename = opt_c_configFile;
496 if (flag == SUBDIR_PARSE || filename == NULL) {
497 filename = alloca(strlen(path) + sizeof(HTTPD_CONF) + 2);
498 sprintf((char *)filename, "%s/%s", path, HTTPD_CONF);
501 while ((f = fopen_for_read(filename)) == NULL) {
502 if (flag >= SUBDIR_PARSE) { /* SUBDIR or TRY_CURDIR */
503 /* config file not found, no changes to config */
506 if (flag == FIRST_PARSE) {
507 /* -c CONFFILE given, but CONFFILE doesn't exist? */
508 if (opt_c_configFile)
509 bb_simple_perror_msg_and_die(opt_c_configFile);
510 /* else: no -c, thus we looked at /etc/httpd.conf,
511 * and it's not there. try ./httpd.conf: */
513 flag = TRY_CURDIR_PARSE;
514 filename = HTTPD_CONF;
517 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
518 /* in "/file:user:pass" lines, we prepend path in subdirs */
519 if (flag != SUBDIR_PARSE)
524 * I:default_index_file
526 * [AD]:IP[/mask] # allow/deny, * for wildcard
527 * Ennn:error.html # error page for status nnn
528 * P:/url:[http://]hostname[:port]/new/path # reverse proxy
529 * .ext:mime/type # mime type
530 * *.php:/path/php # run xxx.php through an interpreter
531 * /file:user:pass # username and password
533 while (fgets(buf, sizeof(buf), f) != NULL) {
538 { /* remove all whitespace, and # comments */
542 /* skip non-whitespace beginning. Often the whole line
543 * is non-whitespace. We want this case to work fast,
544 * without needless copying, therefore we don't merge
545 * this operation into next while loop. */
546 while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
547 && ch != ' ' && ch != '\t'
552 /* if we enter this loop, we have some whitespace.
554 while (ch != '\0' && ch != '\n' && ch != '#') {
555 if (ch != ' ' && ch != '\t') {
561 strlen_buf = p - buf;
563 continue; /* empty line */
566 after_colon = strchr(buf, ':');
568 if (after_colon == NULL || *++after_colon == '\0')
571 ch = (buf[0] & ~0x20); /* toupper if it's a letter */
574 if (index_page != index_html)
575 free((char*)index_page);
576 index_page = xstrdup(after_colon);
580 /* do not allow jumping around using H in subdir's configs */
581 if (flag == FIRST_PARSE && ch == 'H') {
582 home_httpd = xstrdup(after_colon);
587 if (ch == 'A' || ch == 'D') {
590 if (*after_colon == '*') {
592 /* memorize "deny all" */
595 /* skip assumed "A:*", it is a default anyway */
598 /* store "allow/deny IP/mask" line */
599 pip = xzalloc(sizeof(*pip));
600 if (scan_ip_mask(after_colon, &pip->ip, &pip->mask)) {
601 /* IP{/mask} syntax error detected, protect all */
605 pip->allow_deny = ch;
607 /* Deny:from_IP - prepend */
611 /* A:from_IP - append (thus all D's precedes A's) */
612 Htaccess_IP *prev_IP = ip_a_d;
613 if (prev_IP == NULL) {
616 while (prev_IP->next)
617 prev_IP = prev_IP->next;
624 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
625 if (flag == FIRST_PARSE && ch == 'E') {
627 int status = atoi(buf + 1); /* error status code */
629 if (status < HTTP_CONTINUE) {
632 /* then error page; find matching status */
633 for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
634 if (http_response_type[i] == status) {
635 /* We chdir to home_httpd, thus no need to
636 * concat_path_file(home_httpd, after_colon)
638 http_error_page[i] = xstrdup(after_colon);
646 #if ENABLE_FEATURE_HTTPD_PROXY
647 if (flag == FIRST_PARSE && ch == 'P') {
648 /* P:/url:[http://]hostname[:port]/new/path */
649 char *url_from, *host_port, *url_to;
650 Htaccess_Proxy *proxy_entry;
652 url_from = after_colon;
653 host_port = strchr(after_colon, ':');
654 if (host_port == NULL) {
658 if (strncmp(host_port, "http://", 7) == 0)
660 if (*host_port == '\0') {
663 url_to = strchr(host_port, '/');
664 if (url_to == NULL) {
668 proxy_entry = xzalloc(sizeof(*proxy_entry));
669 proxy_entry->url_from = xstrdup(url_from);
670 proxy_entry->host_port = xstrdup(host_port);
672 proxy_entry->url_to = xstrdup(url_to);
673 proxy_entry->next = proxy;
678 /* the rest of directives are non-alphabetic,
679 * must avoid using "toupper'ed" ch */
682 if (ch == '.' /* ".ext:mime/type" */
683 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
684 || (ch == '*' && buf[1] == '.') /* "*.php:/path/php" */
690 cur = xzalloc(sizeof(*cur) /* includes space for NUL */ + strlen_buf);
691 strcpy(cur->before_colon, buf);
692 p = cur->before_colon + (after_colon - buf);
694 cur->after_colon = p;
696 /* .mime line: prepend to mime_a list */
700 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
702 /* script interpreter line: prepend to script_i list */
703 cur->next = script_i;
710 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
711 if (ch == '/') { /* "/file:user:pass" */
716 /* note: path is "" unless we are in SUBDIR parse,
717 * otherwise it does NOT start with "/" */
718 cur = xzalloc(sizeof(*cur) /* includes space for NUL */
722 /* form "/path/file" */
723 sprintf(cur->before_colon, "/%s%.*s",
725 (int) (after_colon - buf - 1), /* includes "/", but not ":" */
727 /* canonicalize it */
728 p = bb_simplify_abs_path_inplace(cur->before_colon);
729 file_len = p - cur->before_colon;
730 /* add "user:pass" after NUL */
731 strcpy(++p, after_colon);
732 cur->after_colon = p;
734 /* insert cur into g_auth */
735 /* g_auth is sorted by decreased filename length */
737 Htaccess *auth, **authp;
740 while ((auth = *authp) != NULL) {
741 if (file_len >= strlen(auth->before_colon)) {
742 /* insert cur before auth */
752 #endif /* BASIC_AUTH */
754 /* the line is not recognized */
756 bb_error_msg("config error '%s' in '%s'", buf, filename);
757 } /* while (fgets) */
762 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
764 * Given a string, html-encode special characters.
765 * This is used for the -e command line option to provide an easy way
766 * for scripts to encode result data without confusing browsers. The
767 * returned string pointer is memory allocated by malloc().
769 * Returns a pointer to the encoded string (malloced).
771 static char *encodeString(const char *string)
773 /* take the simple route and encode everything */
774 /* could possibly scan once to get length. */
775 int len = strlen(string);
776 char *out = xmalloc(len * 6 + 1);
780 while ((ch = *string++)) {
781 /* very simple check for what to encode */
785 p += sprintf(p, "&#%d;", (unsigned char) ch);
790 #endif /* FEATURE_HTTPD_ENCODE_URL_STR */
793 * Given a URL encoded string, convert it to plain ascii.
794 * Since decoding always makes strings smaller, the decode is done in-place.
795 * Thus, callers should xstrdup() the argument if they do not want the
796 * argument modified. The return is the original pointer, allowing this
797 * function to be easily used as arguments to other functions.
799 * string The first string to decode.
800 * option_d 1 if called for httpd -d
802 * Returns a pointer to the decoded string (same as input).
804 static unsigned hex_to_bin(unsigned char c)
811 /* c | 0x20: letters to lower case, non-letters
812 * to (potentially different) non-letters */
813 v = (unsigned)(c | 0x20) - 'a';
819 void t(char c) { printf("'%c'(%u) %u\n", c, c, hex_to_bin(c)); }
820 int main() { t(0x10); t(0x20); t('0'); t('9'); t('A'); t('F'); t('a'); t('f');
821 t('0'-1); t('9'+1); t('A'-1); t('F'+1); t('a'-1); t('f'+1); return 0; }
823 static char *decodeString(char *orig, int option_d)
825 /* note that decoded string is always shorter than original */
830 while ((c = *ptr++) != '\0') {
833 if (option_d && c == '+') {
841 v = hex_to_bin(ptr[0]);
849 v = (v * 16) | hex_to_bin(ptr[1]);
852 if (!option_d && (v == '/' || v == '\0')) {
853 /* caller takes it as indication of invalid
854 * (dangerous wrt exploits) chars */
864 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
866 * Decode a base64 data stream as per rfc1521.
867 * Note that the rfc states that non base64 chars are to be ignored.
868 * Since the decode always results in a shorter size than the input,
869 * it is OK to pass the input arg as an output arg.
870 * Parameter: a pointer to a base64 encoded string.
871 * Decoded data is stored in-place.
873 static void decodeBase64(char *Data)
875 const unsigned char *in = (const unsigned char *)Data;
876 /* The decoded size will be at most 3/4 the size of the encoded */
883 if (t >= '0' && t <= '9')
885 else if (t >= 'A' && t <= 'Z')
887 else if (t >= 'a' && t <= 'z')
901 *Data++ = (char) (ch >> 16);
902 *Data++ = (char) (ch >> 8);
912 * Create a listen server socket on the designated port.
914 static int openServer(void)
916 unsigned n = bb_strtou(bind_addr_or_port, NULL, 10);
917 if (!errno && n && n <= 0xffff)
918 n = create_and_bind_stream_or_die(NULL, n);
920 n = create_and_bind_stream_or_die(bind_addr_or_port, 80);
926 * Log the connection closure and exit.
928 static void log_and_exit(void) NORETURN;
929 static void log_and_exit(void)
931 /* Paranoia. IE said to be buggy. It may send some extra data
932 * or be confused by us just exiting without SHUT_WR. Oh well. */
933 shutdown(1, SHUT_WR);
935 (this also messes up stdin when user runs httpd -i from terminal)
937 while (read(STDIN_FILENO, iobuf, IOBUF_SIZE) > 0)
942 bb_error_msg("closed");
943 _exit(xfunc_error_retval);
947 * Create and send HTTP response headers.
948 * The arguments are combined and sent as one write operation. Note that
949 * IE will puke big-time if the headers are not sent in one packet and the
950 * second packet is delayed for any reason.
951 * responseNum - the result code to send.
953 static void send_headers(int responseNum)
955 static const char RFC1123FMT[] ALIGN1 = "%a, %d %b %Y %H:%M:%S GMT";
957 const char *responseString = "";
958 const char *infoString = NULL;
959 const char *mime_type;
960 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
961 const char *error_page = NULL;
964 time_t timer = time(NULL);
968 for (i = 0; i < ARRAY_SIZE(http_response_type); i++) {
969 if (http_response_type[i] == responseNum) {
970 responseString = http_response[i].name;
971 infoString = http_response[i].info;
972 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
973 error_page = http_error_page[i];
978 /* error message is HTML */
979 mime_type = responseNum == HTTP_OK ?
980 found_mime_type : "text/html";
983 bb_error_msg("response:%u", responseNum);
985 /* emit the current date */
986 strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&timer));
988 "HTTP/1.0 %d %s\r\nContent-type: %s\r\n"
989 "Date: %s\r\nConnection: close\r\n",
990 responseNum, responseString, mime_type, tmp_str);
992 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
993 if (responseNum == HTTP_UNAUTHORIZED) {
994 len += sprintf(iobuf + len,
995 "WWW-Authenticate: Basic realm=\"%s\"\r\n",
999 if (responseNum == HTTP_MOVED_TEMPORARILY) {
1000 len += sprintf(iobuf + len, "Location: %s/%s%s\r\n",
1001 found_moved_temporarily,
1002 (g_query ? "?" : ""),
1003 (g_query ? g_query : ""));
1006 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
1007 if (error_page && access(error_page, R_OK) == 0) {
1008 strcat(iobuf, "\r\n");
1012 fprintf(stderr, "headers: '%s'\n", iobuf);
1013 full_write(STDOUT_FILENO, iobuf, len);
1015 fprintf(stderr, "writing error page: '%s'\n", error_page);
1016 return send_file_and_exit(error_page, SEND_BODY);
1020 if (file_size != -1) { /* file */
1021 strftime(tmp_str, sizeof(tmp_str), RFC1123FMT, gmtime(&last_mod));
1022 #if ENABLE_FEATURE_HTTPD_RANGES
1023 if (responseNum == HTTP_PARTIAL_CONTENT) {
1024 len += sprintf(iobuf + len, "Content-Range: bytes %"OFF_FMT"u-%"OFF_FMT"u/%"OFF_FMT"u\r\n",
1028 file_size = range_end - range_start + 1;
1031 len += sprintf(iobuf + len,
1032 #if ENABLE_FEATURE_HTTPD_RANGES
1033 "Accept-Ranges: bytes\r\n"
1035 "Last-Modified: %s\r\n%s %"OFF_FMT"u\r\n",
1041 iobuf[len++] = '\r';
1042 iobuf[len++] = '\n';
1044 len += sprintf(iobuf + len,
1045 "<HTML><HEAD><TITLE>%d %s</TITLE></HEAD>\n"
1046 "<BODY><H1>%d %s</H1>\n%s\n</BODY></HTML>\n",
1047 responseNum, responseString,
1048 responseNum, responseString, infoString);
1051 fprintf(stderr, "headers: '%s'\n", iobuf);
1052 if (full_write(STDOUT_FILENO, iobuf, len) != len) {
1054 bb_perror_msg("error");
1059 static void send_headers_and_exit(int responseNum) NORETURN;
1060 static void send_headers_and_exit(int responseNum)
1062 send_headers(responseNum);
1067 * Read from the socket until '\n' or EOF. '\r' chars are removed.
1068 * '\n' is replaced with NUL.
1069 * Return number of characters read or 0 if nothing is read
1070 * ('\r' and '\n' are not counted).
1071 * Data is returned in iobuf.
1073 static int get_line(void)
1078 alarm(HEADER_READ_TIMEOUT);
1081 hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
1086 iobuf[count] = c = *hdr_ptr++;
1092 iobuf[count] = '\0';
1095 if (count < (IOBUF_SIZE - 1)) /* check overflow */
1101 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
1103 /* gcc 4.2.1 fares better with NOINLINE */
1104 static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len) NORETURN;
1105 static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post_len)
1107 enum { FROM_CGI = 1, TO_CGI = 2 }; /* indexes in pfd[] */
1108 struct pollfd pfd[3];
1109 int out_cnt; /* we buffer a bit of initial CGI output */
1112 /* iobuf is used for CGI -> network data,
1113 * hdr_buf is for network -> CGI data (POSTDATA) */
1115 /* If CGI dies, we still want to correctly finish reading its output
1116 * and send it to the peer. So please no SIGPIPEs! */
1117 signal(SIGPIPE, SIG_IGN);
1119 // We inconsistently handle a case when more POSTDATA from network
1120 // is coming than we expected. We may give *some part* of that
1121 // extra data to CGI.
1123 //if (hdr_cnt > post_len) {
1124 // /* We got more POSTDATA from network than we expected */
1125 // hdr_cnt = post_len;
1127 post_len -= hdr_cnt;
1128 /* post_len - number of POST bytes not yet read from network */
1130 /* NB: breaking out of this loop jumps to log_and_exit() */
1133 memset(pfd, 0, sizeof(pfd));
1135 pfd[FROM_CGI].fd = fromCgi_rd;
1136 pfd[FROM_CGI].events = POLLIN;
1139 pfd[TO_CGI].fd = toCgi_wr;
1141 pfd[TO_CGI].events = POLLOUT;
1142 } else if (post_len > 0) {
1143 pfd[0].events = POLLIN;
1145 /* post_len <= 0 && hdr_cnt <= 0:
1146 * no more POST data to CGI,
1147 * let CGI see EOF on CGI's stdin */
1153 /* Now wait on the set of sockets */
1154 count = safe_poll(pfd, 3, -1);
1157 if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
1158 /* Weird. CGI didn't exit and no fd's
1159 * are ready, yet poll returned?! */
1162 if (DEBUG && WIFEXITED(status))
1163 bb_error_msg("CGI exited, status=%d", WEXITSTATUS(status));
1164 if (DEBUG && WIFSIGNALED(status))
1165 bb_error_msg("CGI killed, signal=%d", WTERMSIG(status));
1170 if (pfd[TO_CGI].revents) {
1171 /* hdr_cnt > 0 here due to the way pfd[TO_CGI].events set */
1172 /* Have data from peer and can write to CGI */
1173 count = safe_write(toCgi_wr, hdr_ptr, hdr_cnt);
1174 /* Doesn't happen, we dont use nonblocking IO here
1175 *if (count < 0 && errno == EAGAIN) {
1182 /* EOF/broken pipe to CGI, stop piping POST data */
1183 hdr_cnt = post_len = 0;
1187 if (pfd[0].revents) {
1188 /* post_len > 0 && hdr_cnt == 0 here */
1189 /* We expect data, prev data portion is eaten by CGI
1190 * and there *is* data to read from the peer
1192 //count = post_len > (int)sizeof(hdr_buf) ? (int)sizeof(hdr_buf) : post_len;
1193 //count = safe_read(STDIN_FILENO, hdr_buf, count);
1194 count = safe_read(STDIN_FILENO, hdr_buf, sizeof(hdr_buf));
1200 /* no more POST data can be read */
1205 if (pfd[FROM_CGI].revents) {
1206 /* There is something to read from CGI */
1209 /* Are we still buffering CGI output? */
1211 /* HTTP_200[] has single "\r\n" at the end.
1212 * According to http://hoohoo.ncsa.uiuc.edu/cgi/out.html,
1213 * CGI scripts MUST send their own header terminated by
1214 * empty line, then data. That's why we have only one
1215 * <cr><lf> pair here. We will output "200 OK" line
1216 * if needed, but CGI still has to provide blank line
1217 * between header and body */
1219 /* Must use safe_read, not full_read, because
1220 * CGI may output a few first bytes and then wait
1221 * for POSTDATA without closing stdout.
1222 * With full_read we may wait here forever. */
1223 count = safe_read(fromCgi_rd, rbuf + out_cnt, PIPE_BUF - 8);
1225 /* eof (or error) and there was no "HTTP",
1226 * so write it, then write received data */
1228 full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1);
1229 full_write(STDOUT_FILENO, rbuf, out_cnt);
1231 break; /* CGI stdout is closed, exiting */
1235 /* "Status" header format is: "Status: 302 Redirected\r\n" */
1236 if (out_cnt >= 8 && memcmp(rbuf, "Status: ", 8) == 0) {
1237 /* send "HTTP/1.0 " */
1238 if (full_write(STDOUT_FILENO, HTTP_200, 9) != 9)
1240 rbuf += 8; /* skip "Status: " */
1241 count = out_cnt - 8;
1242 out_cnt = -1; /* buffering off */
1243 } else if (out_cnt >= 4) {
1244 /* Did CGI add "HTTP"? */
1245 if (memcmp(rbuf, HTTP_200, 4) != 0) {
1246 /* there is no "HTTP", do it ourself */
1247 if (full_write(STDOUT_FILENO, HTTP_200, sizeof(HTTP_200)-1) != sizeof(HTTP_200)-1)
1251 if (!strstr(rbuf, "ontent-")) {
1252 full_write(s, "Content-type: text/plain\r\n\r\n", 28);
1254 * Counter-example of valid CGI without Content-type:
1255 * echo -en "HTTP/1.0 302 Found\r\n"
1256 * echo -en "Location: http://www.busybox.net\r\n"
1260 out_cnt = -1; /* buffering off */
1263 count = safe_read(fromCgi_rd, rbuf, PIPE_BUF);
1265 break; /* eof (or error) */
1267 if (full_write(STDOUT_FILENO, rbuf, count) != count)
1270 fprintf(stderr, "cgi read %d bytes: '%.*s'\n", count, count, rbuf);
1271 } /* if (pfd[FROM_CGI].revents) */
1277 #if ENABLE_FEATURE_HTTPD_CGI
1279 static void setenv1(const char *name, const char *value)
1281 setenv(name, value ? value : "", 1);
1285 * Spawn CGI script, forward CGI's stdin/out <=> network
1287 * Environment variables are set up and the script is invoked with pipes
1288 * for stdin/stdout. If a POST is being done the script is fed the POST
1289 * data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
1292 * const char *url The requested URL (with leading /).
1293 * int post_len Length of the POST body.
1294 * const char *cookie For set HTTP_COOKIE.
1295 * const char *content_type For set CONTENT_TYPE.
1297 static void send_cgi_and_exit(
1299 const char *request,
1302 const char *content_type) NORETURN;
1303 static void send_cgi_and_exit(
1305 const char *request,
1308 const char *content_type)
1310 struct fd_pair fromCgi; /* CGI -> httpd pipe */
1311 struct fd_pair toCgi; /* httpd -> CGI pipe */
1315 /* Make a copy. NB: caller guarantees:
1316 * url[0] == '/', url[1] != '/' */
1320 * We are mucking with environment _first_ and then vfork/exec,
1321 * this allows us to use vfork safely. Parent doesn't care about
1322 * these environment changes anyway.
1325 /* Check for [dirs/]script.cgi/PATH_INFO */
1326 script = (char*)url;
1327 while ((script = strchr(script + 1, '/')) != NULL) {
1329 if (!is_directory(url + 1, 1, NULL)) {
1330 /* not directory, found script.cgi/PATH_INFO */
1334 *script = '/'; /* is directory, find next '/' */
1336 setenv1("PATH_INFO", script); /* set to /PATH_INFO or "" */
1337 setenv1("REQUEST_METHOD", request);
1339 putenv(xasprintf("%s=%s?%s", "REQUEST_URI", url, g_query));
1341 setenv1("REQUEST_URI", url);
1344 *script = '\0'; /* cut off /PATH_INFO */
1346 /* SCRIPT_FILENAME is required by PHP in CGI mode */
1347 if (home_httpd[0] == '/') {
1348 char *fullpath = concat_path_file(home_httpd, url);
1349 setenv1("SCRIPT_FILENAME", fullpath);
1351 /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
1352 setenv1("SCRIPT_NAME", url);
1353 /* http://hoohoo.ncsa.uiuc.edu/cgi/env.html:
1354 * QUERY_STRING: The information which follows the ? in the URL
1355 * which referenced this script. This is the query information.
1356 * It should not be decoded in any fashion. This variable
1357 * should always be set when there is query information,
1358 * regardless of command line decoding. */
1359 /* (Older versions of bbox seem to do some decoding) */
1360 setenv1("QUERY_STRING", g_query);
1361 putenv((char*)"SERVER_SOFTWARE=busybox httpd/"BB_VER);
1362 putenv((char*)"SERVER_PROTOCOL=HTTP/1.0");
1363 putenv((char*)"GATEWAY_INTERFACE=CGI/1.1");
1364 /* Having _separate_ variables for IP and port defeats
1365 * the purpose of having socket abstraction. Which "port"
1366 * are you using on Unix domain socket?
1367 * IOW - REMOTE_PEER="1.2.3.4:56" makes much more sense.
1370 char *p = rmt_ip_str ? rmt_ip_str : (char*)"";
1371 char *cp = strrchr(p, ':');
1372 if (ENABLE_FEATURE_IPV6 && cp && strchr(cp, ']'))
1374 if (cp) *cp = '\0'; /* delete :PORT */
1375 setenv1("REMOTE_ADDR", p);
1378 #if ENABLE_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
1379 setenv1("REMOTE_PORT", cp + 1);
1383 setenv1("HTTP_USER_AGENT", user_agent);
1385 setenv1("HTTP_ACCEPT", http_accept);
1386 if (http_accept_language)
1387 setenv1("HTTP_ACCEPT_LANGUAGE", http_accept_language);
1389 putenv(xasprintf("CONTENT_LENGTH=%d", post_len));
1391 setenv1("HTTP_COOKIE", cookie);
1393 setenv1("CONTENT_TYPE", content_type);
1394 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1396 setenv1("REMOTE_USER", remoteuser);
1397 putenv((char*)"AUTH_TYPE=Basic");
1401 setenv1("HTTP_REFERER", referer);
1402 setenv1("HTTP_HOST", host); /* set to "" if NULL */
1403 /* setenv1("SERVER_NAME", safe_gethostname()); - don't do this,
1404 * just run "env SERVER_NAME=xyz httpd ..." instead */
1406 xpiped_pair(fromCgi);
1411 /* TODO: log perror? */
1419 xfunc_error_retval = 242;
1421 /* NB: close _first_, then move fds! */
1424 xmove_fd(toCgi.rd, 0); /* replace stdin with the pipe */
1425 xmove_fd(fromCgi.wr, 1); /* replace stdout with the pipe */
1426 /* User seeing stderr output can be a security problem.
1427 * If CGI really wants that, it can always do dup itself. */
1430 /* Chdiring to script's dir */
1431 script = strrchr(url, '/');
1432 if (script != url) { /* paranoia */
1434 if (chdir(url + 1) != 0) {
1435 bb_perror_msg("chdir %s", url + 1);
1436 goto error_execing_cgi;
1438 // not needed: *script = '/';
1442 /* set argv[0] to name without path */
1446 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
1448 char *suffix = strrchr(script, '.');
1452 for (cur = script_i; cur; cur = cur->next) {
1453 if (strcmp(cur->before_colon + 1, suffix) == 0) {
1454 /* found interpreter name */
1455 argv[0] = cur->after_colon;
1464 /* restore default signal dispositions for CGI process */
1471 /* _NOT_ execvp. We do not search PATH. argv[0] is a filename
1472 * without any dir components and will only match a file
1473 * in the current directory */
1474 execv(argv[0], argv);
1476 bb_perror_msg("exec %s", argv[0]);
1479 * (we are CGI here, our stdout is pumped to the net) */
1480 send_headers_and_exit(HTTP_NOT_FOUND);
1483 /* Parent process */
1485 /* Restore variables possibly changed by child */
1486 xfunc_error_retval = 0;
1491 cgi_io_loop_and_exit(fromCgi.rd, toCgi.wr, post_len);
1494 #endif /* FEATURE_HTTPD_CGI */
1497 * Send a file response to a HTTP request, and exit
1500 * const char *url The requested URL (with leading /).
1501 * what What to send (headers/body/both).
1503 static NOINLINE void send_file_and_exit(const char *url, int what)
1509 fd = open(url, O_RDONLY);
1512 bb_perror_msg("can't open '%s'", url);
1513 /* Error pages are sent by using send_file_and_exit(SEND_BODY).
1514 * IOW: it is unsafe to call send_headers_and_exit
1515 * if what is SEND_BODY! Can recurse! */
1516 if (what != SEND_BODY)
1517 send_headers_and_exit(HTTP_NOT_FOUND);
1520 /* If you want to know about EPIPE below
1521 * (happens if you abort downloads from local httpd): */
1522 signal(SIGPIPE, SIG_IGN);
1524 /* If not found, default is "application/octet-stream" */
1525 found_mime_type = "application/octet-stream";
1526 suffix = strrchr(url, '.');
1528 static const char suffixTable[] ALIGN1 =
1529 /* Shorter suffix must be first:
1530 * ".html.htm" will fail for ".htm"
1532 ".txt.h.c.cc.cpp\0" "text/plain\0"
1533 /* .htm line must be after .h line */
1534 ".htm.html\0" "text/html\0"
1535 ".jpg.jpeg\0" "image/jpeg\0"
1536 ".gif\0" "image/gif\0"
1537 ".png\0" "image/png\0"
1538 /* .css line must be after .c line */
1539 ".css\0" "text/css\0"
1540 ".wav\0" "audio/wav\0"
1541 ".avi\0" "video/x-msvideo\0"
1542 ".qt.mov\0" "video/quicktime\0"
1543 ".mpe.mpeg\0" "video/mpeg\0"
1544 ".mid.midi\0" "audio/midi\0"
1545 ".mp3\0" "audio/mpeg\0"
1546 #if 0 /* unpopular */
1547 ".au\0" "audio/basic\0"
1548 ".pac\0" "application/x-ns-proxy-autoconfig\0"
1549 ".vrml.wrl\0" "model/vrml\0"
1551 /* compiler adds another "\0" here */
1555 /* Examine built-in table */
1556 const char *table = suffixTable;
1557 const char *table_next;
1558 for (; *table; table = table_next) {
1559 const char *try_suffix;
1560 const char *mime_type;
1561 mime_type = table + strlen(table) + 1;
1562 table_next = mime_type + strlen(mime_type) + 1;
1563 try_suffix = strstr(table, suffix);
1566 try_suffix += strlen(suffix);
1567 if (*try_suffix == '\0' || *try_suffix == '.') {
1568 found_mime_type = mime_type;
1571 /* Example: strstr(table, ".av") != NULL, but it
1572 * does not match ".avi" after all and we end up here.
1573 * The table is arranged so that in this case we know
1574 * that it can't match anything in the following lines,
1575 * and we stop the search: */
1578 /* ...then user's table */
1579 for (cur = mime_a; cur; cur = cur->next) {
1580 if (strcmp(cur->before_colon, suffix) == 0) {
1581 found_mime_type = cur->after_colon;
1588 bb_error_msg("sending file '%s' content-type: %s",
1589 url, found_mime_type);
1591 #if ENABLE_FEATURE_HTTPD_RANGES
1592 if (what == SEND_BODY)
1593 range_start = 0; /* err pages and ranges don't mix */
1594 range_len = MAXINT(off_t);
1597 range_end = file_size - 1;
1599 if (range_end < range_start
1600 || lseek(fd, range_start, SEEK_SET) != range_start
1602 lseek(fd, 0, SEEK_SET);
1605 range_len = range_end - range_start + 1;
1606 send_headers(HTTP_PARTIAL_CONTENT);
1611 if (what & SEND_HEADERS)
1612 send_headers(HTTP_OK);
1613 #if ENABLE_FEATURE_HTTPD_USE_SENDFILE
1615 off_t offset = range_start;
1617 /* sz is rounded down to 64k */
1618 ssize_t sz = MAXINT(ssize_t) - 0xffff;
1619 IF_FEATURE_HTTPD_RANGES(if (sz > range_len) sz = range_len;)
1620 count = sendfile(STDOUT_FILENO, fd, &offset, sz);
1622 if (offset == range_start)
1623 break; /* fall back to read/write loop */
1626 IF_FEATURE_HTTPD_RANGES(range_len -= sz;)
1627 if (count == 0 || range_len == 0)
1632 while ((count = safe_read(fd, iobuf, IOBUF_SIZE)) > 0) {
1634 IF_FEATURE_HTTPD_RANGES(if (count > range_len) count = range_len;)
1635 n = full_write(STDOUT_FILENO, iobuf, count);
1638 IF_FEATURE_HTTPD_RANGES(range_len -= count;)
1643 IF_FEATURE_HTTPD_USE_SENDFILE(fin:)
1645 bb_perror_msg("error");
1650 static int checkPermIP(void)
1654 for (cur = ip_a_d; cur; cur = cur->next) {
1657 "checkPermIP: '%s' ? '%u.%u.%u.%u/%u.%u.%u.%u'\n",
1659 (unsigned char)(cur->ip >> 24),
1660 (unsigned char)(cur->ip >> 16),
1661 (unsigned char)(cur->ip >> 8),
1662 (unsigned char)(cur->ip),
1663 (unsigned char)(cur->mask >> 24),
1664 (unsigned char)(cur->mask >> 16),
1665 (unsigned char)(cur->mask >> 8),
1666 (unsigned char)(cur->mask)
1669 if ((rmt_ip & cur->mask) == cur->ip)
1670 return (cur->allow_deny == 'A'); /* A -> 1 */
1673 return !flg_deny_all; /* depends on whether we saw "D:*" */
1676 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1678 * Config file entries are of the form "/<path>:<user>:<passwd>".
1679 * If config file has no prefix match for path, access is allowed.
1681 * path The file path
1682 * user_and_passwd "user:passwd" to validate
1684 * Returns 1 if user_and_passwd is OK.
1686 static int check_user_passwd(const char *path, const char *user_and_passwd)
1689 const char *prev = NULL;
1691 for (cur = g_auth; cur; cur = cur->next) {
1692 const char *dir_prefix;
1695 dir_prefix = cur->before_colon;
1698 /* If already saw a match, don't accept other different matches */
1699 if (prev && strcmp(prev, dir_prefix) != 0)
1703 fprintf(stderr, "checkPerm: '%s' ? '%s'\n", dir_prefix, user_and_passwd);
1705 /* If it's not a prefix match, continue searching */
1706 len = strlen(dir_prefix);
1707 if (len != 1 /* dir_prefix "/" matches all, don't need to check */
1708 && (strncmp(dir_prefix, path, len) != 0
1709 || (path[len] != '/' && path[len] != '\0'))
1714 /* Path match found */
1717 if (ENABLE_FEATURE_HTTPD_AUTH_MD5) {
1720 md5_passwd = strchr(cur->after_colon, ':');
1721 if (md5_passwd && md5_passwd[1] == '$' && md5_passwd[2] == '1'
1722 && md5_passwd[3] == '$' && md5_passwd[4]
1728 user_len_p1 = md5_passwd - cur->after_colon;
1729 /* comparing "user:" */
1730 if (strncmp(cur->after_colon, user_and_passwd, user_len_p1) != 0) {
1734 encrypted = pw_encrypt(
1735 user_and_passwd + user_len_p1 /* cleartext pwd from user */,
1736 md5_passwd /*salt */, 1 /* cleanup */);
1737 r = strcmp(encrypted, md5_passwd);
1740 goto set_remoteuser_var; /* Ok */
1745 /* Comparing plaintext "user:pass" in one go */
1746 if (strcmp(cur->after_colon, user_and_passwd) == 0) {
1748 remoteuser = xstrndup(user_and_passwd,
1749 strchrnul(user_and_passwd, ':') - user_and_passwd);
1754 /* 0(bad) if prev is set: matches were found but passwd was wrong */
1755 return (prev == NULL);
1757 #endif /* FEATURE_HTTPD_BASIC_AUTH */
1759 #if ENABLE_FEATURE_HTTPD_PROXY
1760 static Htaccess_Proxy *find_proxy_entry(const char *url)
1763 for (p = proxy; p; p = p->next) {
1764 if (strncmp(url, p->url_from, strlen(p->url_from)) == 0)
1774 static void send_REQUEST_TIMEOUT_and_exit(int sig) NORETURN;
1775 static void send_REQUEST_TIMEOUT_and_exit(int sig UNUSED_PARAM)
1777 send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
1781 * Handle an incoming http request and exit.
1783 static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr) NORETURN;
1784 static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
1786 static const char request_GET[] ALIGN1 = "GET";
1791 #if ENABLE_FEATURE_HTTPD_CGI
1792 static const char request_HEAD[] ALIGN1 = "HEAD";
1793 const char *prequest;
1794 char *cookie = NULL;
1795 char *content_type = NULL;
1796 unsigned long length = 0;
1797 #elif ENABLE_FEATURE_HTTPD_PROXY
1798 #define prequest request_GET
1799 unsigned long length = 0;
1801 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
1802 smallint authorized = -1;
1804 smallint ip_allowed;
1805 char http_major_version;
1806 #if ENABLE_FEATURE_HTTPD_PROXY
1807 char http_minor_version;
1808 char *header_buf = header_buf; /* for gcc */
1809 char *header_ptr = header_ptr;
1810 Htaccess_Proxy *proxy_entry;
1813 /* Allocation of iobuf is postponed until now
1814 * (IOW, server process doesn't need to waste 8k) */
1815 iobuf = xmalloc(IOBUF_SIZE);
1818 if (fromAddr->u.sa.sa_family == AF_INET) {
1819 rmt_ip = ntohl(fromAddr->u.sin.sin_addr.s_addr);
1821 #if ENABLE_FEATURE_IPV6
1822 if (fromAddr->u.sa.sa_family == AF_INET6
1823 && fromAddr->u.sin6.sin6_addr.s6_addr32[0] == 0
1824 && fromAddr->u.sin6.sin6_addr.s6_addr32[1] == 0
1825 && ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[2]) == 0xffff)
1826 rmt_ip = ntohl(fromAddr->u.sin6.sin6_addr.s6_addr32[3]);
1828 if (ENABLE_FEATURE_HTTPD_CGI || DEBUG || verbose) {
1829 /* NB: can be NULL (user runs httpd -i by hand?) */
1830 rmt_ip_str = xmalloc_sockaddr2dotted(&fromAddr->u.sa);
1833 /* this trick makes -v logging much simpler */
1835 applet_name = rmt_ip_str;
1837 bb_error_msg("connected");
1840 /* Install timeout handler. get_line() needs it. */
1841 signal(SIGALRM, send_REQUEST_TIMEOUT_and_exit);
1843 if (!get_line()) /* EOF or error or empty line */
1844 send_headers_and_exit(HTTP_BAD_REQUEST);
1846 /* Determine type of request (GET/POST) */
1847 urlp = strpbrk(iobuf, " \t");
1849 send_headers_and_exit(HTTP_BAD_REQUEST);
1851 #if ENABLE_FEATURE_HTTPD_CGI
1852 prequest = request_GET;
1853 if (strcasecmp(iobuf, prequest) != 0) {
1854 prequest = request_HEAD;
1855 if (strcasecmp(iobuf, prequest) != 0) {
1857 if (strcasecmp(iobuf, prequest) != 0)
1858 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
1862 if (strcasecmp(iobuf, request_GET) != 0)
1863 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
1865 urlp = skip_whitespace(urlp);
1867 send_headers_and_exit(HTTP_BAD_REQUEST);
1869 /* Find end of URL and parse HTTP version, if any */
1870 http_major_version = '0';
1871 IF_FEATURE_HTTPD_PROXY(http_minor_version = '0';)
1872 tptr = strchrnul(urlp, ' ');
1873 /* Is it " HTTP/"? */
1874 if (tptr[0] && strncmp(tptr + 1, HTTP_200, 5) == 0) {
1875 http_major_version = tptr[6];
1876 IF_FEATURE_HTTPD_PROXY(http_minor_version = tptr[8];)
1880 /* Copy URL from after "GET "/"POST " to stack-allocated char[] */
1881 urlcopy = alloca((tptr - urlp) + 2 + strlen(index_page));
1882 /*if (urlcopy == NULL)
1883 * send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);*/
1884 strcpy(urlcopy, urlp);
1885 /* NB: urlcopy ptr is never changed after this */
1887 /* Extract url args if present */
1889 tptr = strchr(urlcopy, '?');
1895 /* Decode URL escape sequences */
1896 tptr = decodeString(urlcopy, 0);
1898 send_headers_and_exit(HTTP_BAD_REQUEST);
1899 if (tptr == urlcopy + 1) {
1900 /* '/' or NUL is encoded */
1901 send_headers_and_exit(HTTP_NOT_FOUND);
1904 /* Canonicalize path */
1905 /* Algorithm stolen from libbb bb_simplify_path(),
1906 * but don't strdup, retain trailing slash, protect root */
1907 urlp = tptr = urlcopy;
1910 /* skip duplicate (or initial) slash */
1915 /* skip extra "/./" */
1916 if (tptr[1] == '/' || !tptr[1]) {
1919 /* "..": be careful */
1920 if (tptr[1] == '.' && (tptr[2] == '/' || !tptr[2])) {
1922 if (urlp == urlcopy) /* protect root */
1923 send_headers_and_exit(HTTP_BAD_REQUEST);
1924 while (*--urlp != '/') /* omit previous dir */;
1931 *++urlp = '\0'; /* terminate after last character */
1933 /* If URL is a directory, add '/' */
1934 if (urlp[-1] != '/') {
1935 if (is_directory(urlcopy + 1, 1, NULL)) {
1936 found_moved_temporarily = urlcopy;
1942 bb_error_msg("url:%s", urlcopy);
1945 ip_allowed = checkPermIP();
1946 while (ip_allowed && (tptr = strchr(tptr + 1, '/')) != NULL) {
1947 /* have path1/path2 */
1949 if (is_directory(urlcopy + 1, 1, NULL)) {
1950 /* may have subdir config */
1951 parse_conf(urlcopy + 1, SUBDIR_PARSE);
1952 ip_allowed = checkPermIP();
1957 #if ENABLE_FEATURE_HTTPD_PROXY
1958 proxy_entry = find_proxy_entry(urlcopy);
1960 header_buf = header_ptr = xmalloc(IOBUF_SIZE);
1963 if (http_major_version >= '0') {
1964 /* Request was with "... HTTP/nXXX", and n >= 0 */
1966 /* Read until blank line for HTTP version specified, else parse immediate */
1969 break; /* EOF or error or empty line */
1971 bb_error_msg("header: '%s'", iobuf);
1973 #if ENABLE_FEATURE_HTTPD_PROXY
1974 /* We need 2 more bytes for yet another "\r\n" -
1975 * see near fdprintf(proxy_fd...) further below */
1976 if (proxy_entry && (header_ptr - header_buf) < IOBUF_SIZE - 2) {
1977 int len = strlen(iobuf);
1978 if (len > IOBUF_SIZE - (header_ptr - header_buf) - 4)
1979 len = IOBUF_SIZE - (header_ptr - header_buf) - 4;
1980 memcpy(header_ptr, iobuf, len);
1982 header_ptr[0] = '\r';
1983 header_ptr[1] = '\n';
1988 #if ENABLE_FEATURE_HTTPD_CGI || ENABLE_FEATURE_HTTPD_PROXY
1989 /* Try and do our best to parse more lines */
1990 if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
1991 /* extra read only for POST */
1992 if (prequest != request_GET
1993 #if ENABLE_FEATURE_HTTPD_CGI
1994 && prequest != request_HEAD
1997 tptr = skip_whitespace(iobuf + sizeof("Content-length:") - 1);
1999 send_headers_and_exit(HTTP_BAD_REQUEST);
2000 /* not using strtoul: it ignores leading minus! */
2001 length = bb_strtou(tptr, NULL, 10);
2002 /* length is "ulong", but we need to pass it to int later */
2003 if (errno || length > INT_MAX)
2004 send_headers_and_exit(HTTP_BAD_REQUEST);
2008 #if ENABLE_FEATURE_HTTPD_CGI
2009 else if (STRNCASECMP(iobuf, "Cookie:") == 0) {
2010 cookie = xstrdup(skip_whitespace(iobuf + sizeof("Cookie:")-1));
2011 } else if (STRNCASECMP(iobuf, "Content-Type:") == 0) {
2012 content_type = xstrdup(skip_whitespace(iobuf + sizeof("Content-Type:")-1));
2013 } else if (STRNCASECMP(iobuf, "Referer:") == 0) {
2014 referer = xstrdup(skip_whitespace(iobuf + sizeof("Referer:")-1));
2015 } else if (STRNCASECMP(iobuf, "User-Agent:") == 0) {
2016 user_agent = xstrdup(skip_whitespace(iobuf + sizeof("User-Agent:")-1));
2017 } else if (STRNCASECMP(iobuf, "Host:") == 0) {
2018 host = xstrdup(skip_whitespace(iobuf + sizeof("Host:")-1));
2019 } else if (STRNCASECMP(iobuf, "Accept:") == 0) {
2020 http_accept = xstrdup(skip_whitespace(iobuf + sizeof("Accept:")-1));
2021 } else if (STRNCASECMP(iobuf, "Accept-Language:") == 0) {
2022 http_accept_language = xstrdup(skip_whitespace(iobuf + sizeof("Accept-Language:")-1));
2025 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2026 if (STRNCASECMP(iobuf, "Authorization:") == 0) {
2027 /* We only allow Basic credentials.
2028 * It shows up as "Authorization: Basic <user>:<passwd>" where
2029 * "<user>:<passwd>" is base64 encoded.
2031 tptr = skip_whitespace(iobuf + sizeof("Authorization:")-1);
2032 if (STRNCASECMP(tptr, "Basic") != 0)
2034 tptr += sizeof("Basic")-1;
2035 /* decodeBase64() skips whitespace itself */
2037 authorized = check_user_passwd(urlcopy, tptr);
2040 #if ENABLE_FEATURE_HTTPD_RANGES
2041 if (STRNCASECMP(iobuf, "Range:") == 0) {
2042 /* We know only bytes=NNN-[MMM] */
2043 char *s = skip_whitespace(iobuf + sizeof("Range:")-1);
2044 if (strncmp(s, "bytes=", 6) == 0) {
2045 s += sizeof("bytes=")-1;
2046 range_start = BB_STRTOOFF(s, &s, 10);
2047 if (s[0] != '-' || range_start < 0) {
2050 range_end = BB_STRTOOFF(s+1, NULL, 10);
2051 if (errno || range_end < range_start)
2057 } /* while extra header reading */
2060 /* We are done reading headers, disable peer timeout */
2063 if (strcmp(bb_basename(urlcopy), HTTPD_CONF) == 0 || !ip_allowed) {
2064 /* protect listing [/path]/httpd.conf or IP deny */
2065 send_headers_and_exit(HTTP_FORBIDDEN);
2068 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
2069 /* Case: no "Authorization:" was seen, but page does require passwd.
2070 * Check that with dummy user:pass */
2072 authorized = check_user_passwd(urlcopy, ":");
2074 send_headers_and_exit(HTTP_UNAUTHORIZED);
2077 if (found_moved_temporarily) {
2078 send_headers_and_exit(HTTP_MOVED_TEMPORARILY);
2081 #if ENABLE_FEATURE_HTTPD_PROXY
2082 if (proxy_entry != NULL) {
2084 len_and_sockaddr *lsa;
2086 proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
2088 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2089 lsa = host2sockaddr(proxy_entry->host_port, 80);
2091 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2092 if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
2093 send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
2094 fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",
2095 prequest, /* GET or POST */
2096 proxy_entry->url_to, /* url part 1 */
2097 urlcopy + strlen(proxy_entry->url_from), /* url part 2 */
2098 (g_query ? "?" : ""), /* "?" (maybe) */
2099 (g_query ? g_query : ""), /* query string (maybe) */
2100 http_major_version, http_minor_version);
2101 header_ptr[0] = '\r';
2102 header_ptr[1] = '\n';
2104 write(proxy_fd, header_buf, header_ptr - header_buf);
2105 free(header_buf); /* on the order of 8k, free it */
2106 /* cgi_io_loop_and_exit needs to have two distinct fds */
2107 cgi_io_loop_and_exit(proxy_fd, dup(proxy_fd), length);
2111 tptr = urlcopy + 1; /* skip first '/' */
2113 #if ENABLE_FEATURE_HTTPD_CGI
2114 if (strncmp(tptr, "cgi-bin/", 8) == 0) {
2115 if (tptr[8] == '\0') {
2116 /* protect listing "cgi-bin/" */
2117 send_headers_and_exit(HTTP_FORBIDDEN);
2119 send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
2123 if (urlp[-1] == '/')
2124 strcpy(urlp, index_page);
2125 if (stat(tptr, &sb) == 0) {
2126 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
2127 char *suffix = strrchr(tptr, '.');
2130 for (cur = script_i; cur; cur = cur->next) {
2131 if (strcmp(cur->before_colon + 1, suffix) == 0) {
2132 send_cgi_and_exit(urlcopy, prequest, length, cookie, content_type);
2137 file_size = sb.st_size;
2138 last_mod = sb.st_mtime;
2140 #if ENABLE_FEATURE_HTTPD_CGI
2141 else if (urlp[-1] == '/') {
2142 /* It's a dir URL and there is no index.html
2143 * Try cgi-bin/index.cgi */
2144 if (access("/cgi-bin/index.cgi"+1, X_OK) == 0) {
2147 send_cgi_and_exit("/cgi-bin/index.cgi", prequest, length, cookie, content_type);
2150 /* else fall through to send_file, it errors out if open fails: */
2152 if (prequest != request_GET && prequest != request_HEAD) {
2153 /* POST for files does not make sense */
2154 send_headers_and_exit(HTTP_NOT_IMPLEMENTED);
2156 send_file_and_exit(tptr,
2157 (prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
2160 send_file_and_exit(tptr, SEND_HEADERS_AND_BODY);
2165 * The main http server function.
2166 * Given a socket, listen for new connections and farm out
2167 * the processing as a [v]forked process.
2171 static void mini_httpd(int server_socket) NORETURN;
2172 static void mini_httpd(int server_socket)
2174 /* NB: it's best to not use xfuncs in this loop before fork().
2175 * Otherwise server may die on transient errors (temporary
2176 * out-of-memory condition, etc), which is Bad(tm).
2177 * Try to do any dangerous calls after fork.
2181 len_and_sockaddr fromAddr;
2183 /* Wait for connections... */
2184 fromAddr.len = LSA_SIZEOF_SA;
2185 n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
2189 /* set the KEEPALIVE option to cull dead connections */
2190 setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
2194 /* Do not reload config on HUP */
2195 signal(SIGHUP, SIG_IGN);
2196 close(server_socket);
2200 handle_incoming_and_exit(&fromAddr);
2202 /* parent, or fork failed */
2208 static void mini_httpd_nommu(int server_socket, int argc, char **argv) NORETURN;
2209 static void mini_httpd_nommu(int server_socket, int argc, char **argv)
2211 char *argv_copy[argc + 2];
2213 argv_copy[0] = argv[0];
2214 argv_copy[1] = (char*)"-i";
2215 memcpy(&argv_copy[2], &argv[1], argc * sizeof(argv[0]));
2217 /* NB: it's best to not use xfuncs in this loop before vfork().
2218 * Otherwise server may die on transient errors (temporary
2219 * out-of-memory condition, etc), which is Bad(tm).
2220 * Try to do any dangerous calls after fork.
2224 len_and_sockaddr fromAddr;
2226 /* Wait for connections... */
2227 fromAddr.len = LSA_SIZEOF_SA;
2228 n = accept(server_socket, &fromAddr.u.sa, &fromAddr.len);
2232 /* set the KEEPALIVE option to cull dead connections */
2233 setsockopt(n, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
2237 /* Do not reload config on HUP */
2238 signal(SIGHUP, SIG_IGN);
2239 close(server_socket);
2243 /* Run a copy of ourself in inetd mode */
2246 /* parent, or vfork failed */
2254 * Process a HTTP connection on stdin/out.
2257 static void mini_httpd_inetd(void) NORETURN;
2258 static void mini_httpd_inetd(void)
2260 len_and_sockaddr fromAddr;
2262 memset(&fromAddr, 0, sizeof(fromAddr));
2263 fromAddr.len = LSA_SIZEOF_SA;
2264 /* NB: can fail if user runs it by hand and types in http cmds */
2265 getpeername(0, &fromAddr.u.sa, &fromAddr.len);
2266 handle_incoming_and_exit(&fromAddr);
2269 static void sighup_handler(int sig UNUSED_PARAM)
2271 parse_conf(DEFAULT_PATH_HTTPD_CONF, SIGNALED_PARSE);
2275 c_opt_config_file = 0,
2278 IF_FEATURE_HTTPD_ENCODE_URL_STR(e_opt_encode_url,)
2279 IF_FEATURE_HTTPD_BASIC_AUTH( r_opt_realm ,)
2280 IF_FEATURE_HTTPD_AUTH_MD5( m_opt_md5 ,)
2281 IF_FEATURE_HTTPD_SETUID( u_opt_setuid ,)
2286 OPT_CONFIG_FILE = 1 << c_opt_config_file,
2287 OPT_DECODE_URL = 1 << d_opt_decode_url,
2288 OPT_HOME_HTTPD = 1 << h_opt_home_httpd,
2289 OPT_ENCODE_URL = IF_FEATURE_HTTPD_ENCODE_URL_STR((1 << e_opt_encode_url)) + 0,
2290 OPT_REALM = IF_FEATURE_HTTPD_BASIC_AUTH( (1 << r_opt_realm )) + 0,
2291 OPT_MD5 = IF_FEATURE_HTTPD_AUTH_MD5( (1 << m_opt_md5 )) + 0,
2292 OPT_SETUID = IF_FEATURE_HTTPD_SETUID( (1 << u_opt_setuid )) + 0,
2293 OPT_PORT = 1 << p_opt_port,
2294 OPT_INETD = 1 << p_opt_inetd,
2295 OPT_FOREGROUND = 1 << p_opt_foreground,
2296 OPT_VERBOSE = 1 << p_opt_verbose,
2300 int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
2301 int httpd_main(int argc UNUSED_PARAM, char **argv)
2303 int server_socket = server_socket; /* for gcc */
2305 char *url_for_decode;
2306 IF_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
2307 IF_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
2308 IF_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
2309 IF_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
2313 #if ENABLE_LOCALE_SUPPORT
2314 /* Undo busybox.c: we want to speak English in http (dates etc) */
2315 setlocale(LC_TIME, "C");
2318 home_httpd = xrealloc_getcwd_or_warn(NULL);
2319 /* -v counts, -i implies -f */
2320 opt_complementary = "vv:if";
2321 /* We do not "absolutize" path given by -h (home) opt.
2322 * If user gives relative path in -h,
2323 * $SCRIPT_FILENAME will not be set. */
2324 opt = getopt32(argv, "c:d:h:"
2325 IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
2326 IF_FEATURE_HTTPD_BASIC_AUTH("r:")
2327 IF_FEATURE_HTTPD_AUTH_MD5("m:")
2328 IF_FEATURE_HTTPD_SETUID("u:")
2330 &opt_c_configFile, &url_for_decode, &home_httpd
2331 IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
2332 IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)
2333 IF_FEATURE_HTTPD_AUTH_MD5(, &pass)
2334 IF_FEATURE_HTTPD_SETUID(, &s_ugid)
2335 , &bind_addr_or_port
2338 if (opt & OPT_DECODE_URL) {
2339 fputs(decodeString(url_for_decode, 1), stdout);
2342 #if ENABLE_FEATURE_HTTPD_ENCODE_URL_STR
2343 if (opt & OPT_ENCODE_URL) {
2344 fputs(encodeString(url_for_encode), stdout);
2348 #if ENABLE_FEATURE_HTTPD_AUTH_MD5
2349 if (opt & OPT_MD5) {
2350 puts(pw_encrypt(pass, "$1$", 1));
2354 #if ENABLE_FEATURE_HTTPD_SETUID
2355 if (opt & OPT_SETUID) {
2356 xget_uidgid(&ugid, s_ugid);
2361 if (!(opt & OPT_FOREGROUND)) {
2362 bb_daemonize_or_rexec(0, argv); /* don't change current directory */
2367 if (!(opt & OPT_INETD)) {
2368 signal(SIGCHLD, SIG_IGN);
2369 server_socket = openServer();
2370 #if ENABLE_FEATURE_HTTPD_SETUID
2371 /* drop privileges */
2372 if (opt & OPT_SETUID) {
2373 if (ugid.gid != (gid_t)-1) {
2374 if (setgroups(1, &ugid.gid) == -1)
2375 bb_perror_msg_and_die("setgroups");
2384 /* User can do it himself: 'env - PATH="$PATH" httpd'
2385 * We don't do it because we don't want to screw users
2387 * 'env - VAR1=val1 VAR2=val2 httpd'
2388 * and have VAR1 and VAR2 values visible in their CGIs.
2389 * Besides, it is also smaller. */
2391 char *p = getenv("PATH");
2392 /* env strings themself are not freed, no need to xstrdup(p): */
2396 // if (!(opt & OPT_INETD))
2397 // setenv_long("SERVER_PORT", ???);
2401 parse_conf(DEFAULT_PATH_HTTPD_CONF, FIRST_PARSE);
2402 if (!(opt & OPT_INETD))
2403 signal(SIGHUP, sighup_handler);
2405 xfunc_error_retval = 0;
2406 if (opt & OPT_INETD)
2409 if (!(opt & OPT_FOREGROUND))
2410 bb_daemonize(0); /* don't change current directory */
2411 mini_httpd(server_socket); /* never returns */
2413 mini_httpd_nommu(server_socket, argc, argv); /* never returns */